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Finding the Fourth Proportional to 21,569.80, 29,691.48 and 18,595.48

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Solution

The fourth proportional to 21,569.80, 29,691.48 and 18,595.48 is: 25,597.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,569.80 : 29,691.48 = 18,595.48 : x
  2. Step 2: Convert to fraction form
    21,569.80/29,691.48 = 18,595.48/x
  3. Step 3: Cross multiply
    21,569.80x = 29,691.48 × 18,595.48
  4. Step 4: Simplify right side
    21,569.80x = 552,127,322.51
  5. Step 5: Solve for x
    x = 552,127,322.51/21,569.80
  6. Step 6: Final answer
    x = 25,597.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.